Spectral, energy and temporal parameters of a pulsed discharge in xenon are studied. It is shown that the use of unidirectional current pulse instead of oscillating one improves radiation power in the range 200-350 nm, while duration of the radiation pulse at half-maximum decreases. The use of SOS-diodes in the pulse generator allows obtaining the maximal radiant intensity 64 kW/sr in the range 200-350 nm and the pulse duration of ~2 μs FWHM.